Misused or overused punctuation marks can really hurt your manuscript. Here are a few tips to ponder and look for in your WIP (work in progress):
Commas: Often placed, in the wrong space
Ellipsis: Used too often in stories...
Exclamation points: Overused!
Question mark: Generally used correctly?
Semicolon: Best to create a new sentence; conjunctions and commas are other options.
Periods: These are usually fine.